For Neo like fire red can keep in a wider range of pH values so can add coral chips. I’m keeping PRL and Pintos so have to get the pH values low. No coral chips for me. I use deionised water for water change and add minerals after that to maintain the tds.

For dosing have to add slowly to raise the tds to the value you want. Do you have a tds meter? Try not to raise it too quickly, your shrimps may get a shock.